Free CCA-505 Braindumps

Exam Number: CCA-505

Provider: Cloudera

Questions: 45

Updated On:
16-Mar-2019

QUESTION: 1 You have installed a cluster running HDFS and MapReduce version 2 (MRv2) on YARN. You have no afs.hosts entry()ies in your hdfs-alte.xml configuration file. You configure a new worker node by setting fs.default.name in its configuration files to point to the NameNode on your cluster, and you start the DataNode daemon on that worker node. What do you have to do on the cluster to allow the worker node to join, and start storing HDFS blocks?

A. Nothing; the worker node will automatically join the cluster when the DataNode daemon is started. B. Without creating a dfs.hosts file or making any entries, run the command hadoop dfsadmin -refreshHadoop on the NameNode C. Create a dfs.hosts file on the NameNode, add the worker node's name to it, then issue the command hadoop dfsadmin -refreshNodes on the NameNode D. Restart the NameNode

Answer(s): D QUESTION: 2 Given:

You want to clean up this list by removing jobs where the state is KILLED. What command you enter?

Answer(s): A Reference: http://docs.hortonworks.com/HDPDocuments/HDP2/HDP-2.1-latest/bk_using-apache- hadoop/content/common_mrv2_commands.html QUESTION: 3 Assuming a cluster running HDFS, MapReduce version 2 (MRv2) on YARN with all settings at their default, what do you need to do when adding a new slave node to a cluster?

A. Nothing, other than ensuring that DNS (or /etc/hosts files on all machines) contains am entry for the new node. B. Restart the NameNode and ResourceManager deamons and resubmit any running jobs C. Increase the value of dfs.number.of.needs in hdfs-site.xml